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path: root/drivers/block/ioctl.c
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Diffstat (limited to 'drivers/block/ioctl.c')
-rw-r--r--drivers/block/ioctl.c275
1 files changed, 0 insertions, 275 deletions
diff --git a/drivers/block/ioctl.c b/drivers/block/ioctl.c
deleted file mode 100644
index 6e278474f9a8..000000000000
--- a/drivers/block/ioctl.c
+++ /dev/null
@@ -1,275 +0,0 @@
-#include <linux/sched.h> /* for capable() */
-#include <linux/blkdev.h>
-#include <linux/blkpg.h>
-#include <linux/backing-dev.h>
-#include <linux/buffer_head.h>
-#include <linux/smp_lock.h>
-#include <asm/uaccess.h>
-
-static int blkpg_ioctl(struct block_device *bdev, struct blkpg_ioctl_arg __user *arg)
-{
- struct block_device *bdevp;
- struct gendisk *disk;
- struct blkpg_ioctl_arg a;
- struct blkpg_partition p;
- long long start, length;
- int part;
- int i;
-
- if (!capable(CAP_SYS_ADMIN))
- return -EACCES;
- if (copy_from_user(&a, arg, sizeof(struct blkpg_ioctl_arg)))
- return -EFAULT;
- if (copy_from_user(&p, a.data, sizeof(struct blkpg_partition)))
- return -EFAULT;
- disk = bdev->bd_disk;
- if (bdev != bdev->bd_contains)
- return -EINVAL;
- part = p.pno;
- if (part <= 0 || part >= disk->minors)
- return -EINVAL;
- switch (a.op) {
- case BLKPG_ADD_PARTITION:
- start = p.start >> 9;
- length = p.length >> 9;
- /* check for fit in a hd_struct */
- if (sizeof(sector_t) == sizeof(long) &&
- sizeof(long long) > sizeof(long)) {
- long pstart = start, plength = length;
- if (pstart != start || plength != length
- || pstart < 0 || plength < 0)
- return -EINVAL;
- }
- /* partition number in use? */
- down(&bdev->bd_sem);
- if (disk->part[part - 1]) {
- up(&bdev->bd_sem);
- return -EBUSY;
- }
- /* overlap? */
- for (i = 0; i < disk->minors - 1; i++) {
- struct hd_struct *s = disk->part[i];
-
- if (!s)
- continue;
- if (!(start+length <= s->start_sect ||
- start >= s->start_sect + s->nr_sects)) {
- up(&bdev->bd_sem);
- return -EBUSY;
- }
- }
- /* all seems OK */
- add_partition(disk, part, start, length);
- up(&bdev->bd_sem);
- return 0;
- case BLKPG_DEL_PARTITION:
- if (!disk->part[part-1])
- return -ENXIO;
- if (disk->part[part - 1]->nr_sects == 0)
- return -ENXIO;
- bdevp = bdget_disk(disk, part);
- if (!bdevp)
- return -ENOMEM;
- down(&bdevp->bd_sem);
- if (bdevp->bd_openers) {
- up(&bdevp->bd_sem);
- bdput(bdevp);
- return -EBUSY;
- }
- /* all seems OK */
- fsync_bdev(bdevp);
- invalidate_bdev(bdevp, 0);
-
- down(&bdev->bd_sem);
- delete_partition(disk, part);
- up(&bdev->bd_sem);
- up(&bdevp->bd_sem);
- bdput(bdevp);
-
- return 0;
- default:
- return -EINVAL;
- }
-}
-
-static int blkdev_reread_part(struct block_device *bdev)
-{
- struct gendisk *disk = bdev->bd_disk;
- int res;
-
- if (disk->minors == 1 || bdev != bdev->bd_contains)
- return -EINVAL;
- if (!capable(CAP_SYS_ADMIN))
- return -EACCES;
- if (down_trylock(&bdev->bd_sem))
- return -EBUSY;
- res = rescan_partitions(disk, bdev);
- up(&bdev->bd_sem);
- return res;
-}
-
-static int put_ushort(unsigned long arg, unsigned short val)
-{
- return put_user(val, (unsigned short __user *)arg);
-}
-
-static int put_int(unsigned long arg, int val)
-{
- return put_user(val, (int __user *)arg);
-}
-
-static int put_long(unsigned long arg, long val)
-{
- return put_user(val, (long __user *)arg);
-}
-
-static int put_ulong(unsigned long arg, unsigned long val)
-{
- return put_user(val, (unsigned long __user *)arg);
-}
-
-static int put_u64(unsigned long arg, u64 val)
-{
- return put_user(val, (u64 __user *)arg);
-}
-
-static int blkdev_locked_ioctl(struct file *file, struct block_device *bdev,
- unsigned cmd, unsigned long arg)
-{
- struct backing_dev_info *bdi;
- int ret, n;
-
- switch (cmd) {
- case BLKRAGET:
- case BLKFRAGET:
- if (!arg)
- return -EINVAL;
- bdi = blk_get_backing_dev_info(bdev);
- if (bdi == NULL)
- return -ENOTTY;
- return put_long(arg, (bdi->ra_pages * PAGE_CACHE_SIZE) / 512);
- case BLKROGET:
- return put_int(arg, bdev_read_only(bdev) != 0);
- case BLKBSZGET: /* get the logical block size (cf. BLKSSZGET) */
- return put_int(arg, block_size(bdev));
- case BLKSSZGET: /* get block device hardware sector size */
- return put_int(arg, bdev_hardsect_size(bdev));
- case BLKSECTGET:
- return put_ushort(arg, bdev_get_queue(bdev)->max_sectors);
- case BLKRASET:
- case BLKFRASET:
- if(!capable(CAP_SYS_ADMIN))
- return -EACCES;
- bdi = blk_get_backing_dev_info(bdev);
- if (bdi == NULL)
- return -ENOTTY;
- bdi->ra_pages = (arg * 512) / PAGE_CACHE_SIZE;
- return 0;
- case BLKBSZSET:
- /* set the logical block size */
- if (!capable(CAP_SYS_ADMIN))
- return -EACCES;
- if (!arg)
- return -EINVAL;
- if (get_user(n, (int __user *) arg))
- return -EFAULT;
- if (bd_claim(bdev, file) < 0)
- return -EBUSY;
- ret = set_blocksize(bdev, n);
- bd_release(bdev);
- return ret;
- case BLKPG:
- return blkpg_ioctl(bdev, (struct blkpg_ioctl_arg __user *) arg);
- case BLKRRPART:
- return blkdev_reread_part(bdev);
- case BLKGETSIZE:
- if ((bdev->bd_inode->i_size >> 9) > ~0UL)
- return -EFBIG;
- return put_ulong(arg, bdev->bd_inode->i_size >> 9);
- case BLKGETSIZE64:
- return put_u64(arg, bdev->bd_inode->i_size);
- }
- return -ENOIOCTLCMD;
-}
-
-static int blkdev_driver_ioctl(struct inode *inode, struct file *file,
- struct gendisk *disk, unsigned cmd, unsigned long arg)
-{
- int ret;
- if (disk->fops->unlocked_ioctl)
- return disk->fops->unlocked_ioctl(file, cmd, arg);
-
- if (disk->fops->ioctl) {
- lock_kernel();
- ret = disk->fops->ioctl(inode, file, cmd, arg);
- unlock_kernel();
- return ret;
- }
-
- return -ENOTTY;
-}
-
-int blkdev_ioctl(struct inode *inode, struct file *file, unsigned cmd,
- unsigned long arg)
-{
- struct block_device *bdev = inode->i_bdev;
- struct gendisk *disk = bdev->bd_disk;
- int ret, n;
-
- switch(cmd) {
- case BLKFLSBUF:
- if (!capable(CAP_SYS_ADMIN))
- return -EACCES;
-
- ret = blkdev_driver_ioctl(inode, file, disk, cmd, arg);
- /* -EINVAL to handle old uncorrected drivers */
- if (ret != -EINVAL && ret != -ENOTTY)
- return ret;
-
- lock_kernel();
- fsync_bdev(bdev);
- invalidate_bdev(bdev, 0);
- unlock_kernel();
- return 0;
-
- case BLKROSET:
- ret = blkdev_driver_ioctl(inode, file, disk, cmd, arg);
- /* -EINVAL to handle old uncorrected drivers */
- if (ret != -EINVAL && ret != -ENOTTY)
- return ret;
- if (!capable(CAP_SYS_ADMIN))
- return -EACCES;
- if (get_user(n, (int __user *)(arg)))
- return -EFAULT;
- lock_kernel();
- set_device_ro(bdev, n);
- unlock_kernel();
- return 0;
- }
-
- lock_kernel();
- ret = blkdev_locked_ioctl(file, bdev, cmd, arg);
- unlock_kernel();
- if (ret != -ENOIOCTLCMD)
- return ret;
-
- return blkdev_driver_ioctl(inode, file, disk, cmd, arg);
-}
-
-/* Most of the generic ioctls are handled in the normal fallback path.
- This assumes the blkdev's low level compat_ioctl always returns
- ENOIOCTLCMD for unknown ioctls. */
-long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
-{
- struct block_device *bdev = file->f_dentry->d_inode->i_bdev;
- struct gendisk *disk = bdev->bd_disk;
- int ret = -ENOIOCTLCMD;
- if (disk->fops->compat_ioctl) {
- lock_kernel();
- ret = disk->fops->compat_ioctl(file, cmd, arg);
- unlock_kernel();
- }
- return ret;
-}
-
-EXPORT_SYMBOL_GPL(blkdev_ioctl);
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-18 14:57:55 +0300